1 /* SCTP kernel implementation
2 * (C) Copyright IBM Corp. 2002, 2004
3 * Copyright (c) 2002 Intel Corp.
5 * This file is part of the SCTP kernel implementation
7 * Sysctl related interfaces for SCTP.
9 * This SCTP implementation is free software;
10 * you can redistribute it and/or modify it under the terms of
11 * the GNU General Public License as published by
12 * the Free Software Foundation; either version 2, or (at your option)
15 * This SCTP implementation is distributed in the hope that it
16 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
17 * ************************
18 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
19 * See the GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with GNU CC; see the file COPYING. If not, write to
23 * the Free Software Foundation, 59 Temple Place - Suite 330,
24 * Boston, MA 02111-1307, USA.
26 * Please send any bug reports or fixes you make to the
28 * lksctp developers <lksctp-developers@lists.sourceforge.net>
30 * Or submit a bug report through the following website:
31 * http://www.sf.net/projects/lksctp
33 * Written or modified by:
34 * Mingqin Liu <liuming@us.ibm.com>
35 * Jon Grimm <jgrimm@us.ibm.com>
36 * Ardelle Fan <ardelle.fan@intel.com>
37 * Ryan Layer <rmlayer@us.ibm.com>
38 * Sridhar Samudrala <sri@us.ibm.com>
40 * Any bugs reported given to us we will try to fix... any fixes shared will
41 * be incorporated into the next SCTP release.
44 #include <net/sctp/structs.h>
45 #include <net/sctp/sctp.h>
46 #include <linux/sysctl.h>
50 static int timer_max = 86400000; /* ms in one day */
51 static int int_max = INT_MAX;
52 static int sack_timer_min = 1;
53 static int sack_timer_max = 500;
54 static int addr_scope_max = 3; /* check sctp_scope_policy_t in include/net/sctp/constants.h for max entries */
55 static int rwnd_scale_max = 16;
56 static unsigned long max_autoclose_min = 0;
57 static unsigned long max_autoclose_max =
58 (MAX_SCHEDULE_TIMEOUT / HZ > UINT_MAX)
59 ? UINT_MAX : MAX_SCHEDULE_TIMEOUT / HZ;
61 extern long sysctl_sctp_mem[3];
62 extern int sysctl_sctp_rmem[3];
63 extern int sysctl_sctp_wmem[3];
65 static int proc_sctp_do_hmac_alg(ctl_table *ctl,
67 void __user *buffer, size_t *lenp,
69 static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
70 void __user *buffer, size_t *lenp,
73 static ctl_table sctp_table[] = {
75 .procname = "sctp_mem",
76 .data = &sysctl_sctp_mem,
77 .maxlen = sizeof(sysctl_sctp_mem),
79 .proc_handler = proc_doulongvec_minmax
82 .procname = "sctp_rmem",
83 .data = &sysctl_sctp_rmem,
84 .maxlen = sizeof(sysctl_sctp_rmem),
86 .proc_handler = proc_dointvec,
89 .procname = "sctp_wmem",
90 .data = &sysctl_sctp_wmem,
91 .maxlen = sizeof(sysctl_sctp_wmem),
93 .proc_handler = proc_dointvec,
99 static ctl_table sctp_net_table[] = {
101 .procname = "rto_initial",
102 .data = &init_net.sctp.rto_initial,
103 .maxlen = sizeof(unsigned int),
105 .proc_handler = proc_dointvec_minmax,
110 .procname = "rto_min",
111 .data = &init_net.sctp.rto_min,
112 .maxlen = sizeof(unsigned int),
114 .proc_handler = proc_dointvec_minmax,
119 .procname = "rto_max",
120 .data = &init_net.sctp.rto_max,
121 .maxlen = sizeof(unsigned int),
123 .proc_handler = proc_dointvec_minmax,
128 .procname = "rto_alpha_exp_divisor",
129 .data = &init_net.sctp.rto_alpha,
130 .maxlen = sizeof(int),
132 .proc_handler = proc_dointvec,
135 .procname = "rto_beta_exp_divisor",
136 .data = &init_net.sctp.rto_beta,
137 .maxlen = sizeof(int),
139 .proc_handler = proc_dointvec,
142 .procname = "max_burst",
143 .data = &init_net.sctp.max_burst,
144 .maxlen = sizeof(int),
146 .proc_handler = proc_dointvec_minmax,
151 .procname = "cookie_preserve_enable",
152 .data = &init_net.sctp.cookie_preserve_enable,
153 .maxlen = sizeof(int),
155 .proc_handler = proc_dointvec,
158 .procname = "cookie_hmac_alg",
161 .proc_handler = proc_sctp_do_hmac_alg,
164 .procname = "valid_cookie_life",
165 .data = &init_net.sctp.valid_cookie_life,
166 .maxlen = sizeof(unsigned int),
168 .proc_handler = proc_dointvec_minmax,
173 .procname = "sack_timeout",
174 .data = &init_net.sctp.sack_timeout,
175 .maxlen = sizeof(int),
177 .proc_handler = proc_dointvec_minmax,
178 .extra1 = &sack_timer_min,
179 .extra2 = &sack_timer_max,
182 .procname = "hb_interval",
183 .data = &init_net.sctp.hb_interval,
184 .maxlen = sizeof(unsigned int),
186 .proc_handler = proc_dointvec_minmax,
191 .procname = "association_max_retrans",
192 .data = &init_net.sctp.max_retrans_association,
193 .maxlen = sizeof(int),
195 .proc_handler = proc_dointvec_minmax,
200 .procname = "path_max_retrans",
201 .data = &init_net.sctp.max_retrans_path,
202 .maxlen = sizeof(int),
204 .proc_handler = proc_dointvec_minmax,
209 .procname = "max_init_retransmits",
210 .data = &init_net.sctp.max_retrans_init,
211 .maxlen = sizeof(int),
213 .proc_handler = proc_dointvec_minmax,
218 .procname = "pf_retrans",
219 .data = &init_net.sctp.pf_retrans,
220 .maxlen = sizeof(int),
222 .proc_handler = proc_dointvec_minmax,
227 .procname = "sndbuf_policy",
228 .data = &init_net.sctp.sndbuf_policy,
229 .maxlen = sizeof(int),
231 .proc_handler = proc_dointvec,
234 .procname = "rcvbuf_policy",
235 .data = &init_net.sctp.rcvbuf_policy,
236 .maxlen = sizeof(int),
238 .proc_handler = proc_dointvec,
241 .procname = "default_auto_asconf",
242 .data = &init_net.sctp.default_auto_asconf,
243 .maxlen = sizeof(int),
245 .proc_handler = proc_dointvec,
248 .procname = "addip_enable",
249 .data = &init_net.sctp.addip_enable,
250 .maxlen = sizeof(int),
252 .proc_handler = proc_dointvec,
255 .procname = "addip_noauth_enable",
256 .data = &init_net.sctp.addip_noauth,
257 .maxlen = sizeof(int),
259 .proc_handler = proc_dointvec,
262 .procname = "prsctp_enable",
263 .data = &init_net.sctp.prsctp_enable,
264 .maxlen = sizeof(int),
266 .proc_handler = proc_dointvec,
269 .procname = "auth_enable",
270 .data = &init_net.sctp.auth_enable,
271 .maxlen = sizeof(int),
273 .proc_handler = proc_sctp_do_auth,
276 .procname = "addr_scope_policy",
277 .data = &init_net.sctp.scope_policy,
278 .maxlen = sizeof(int),
280 .proc_handler = proc_dointvec_minmax,
282 .extra2 = &addr_scope_max,
285 .procname = "rwnd_update_shift",
286 .data = &init_net.sctp.rwnd_upd_shift,
287 .maxlen = sizeof(int),
289 .proc_handler = &proc_dointvec_minmax,
291 .extra2 = &rwnd_scale_max,
294 .procname = "max_autoclose",
295 .data = &init_net.sctp.max_autoclose,
296 .maxlen = sizeof(unsigned long),
298 .proc_handler = &proc_doulongvec_minmax,
299 .extra1 = &max_autoclose_min,
300 .extra2 = &max_autoclose_max,
306 static int proc_sctp_do_hmac_alg(ctl_table *ctl,
308 void __user *buffer, size_t *lenp,
311 struct net *net = current->nsproxy->net_ns;
318 memset(&tbl, 0, sizeof(struct ctl_table));
324 tbl.data = net->sctp.sctp_hmac_alg ? : none;
325 tbl.maxlen = strlen(tbl.data);
327 ret = proc_dostring(&tbl, write, buffer, lenp, ppos);
330 #ifdef CONFIG_CRYPTO_MD5
331 if (!strncmp(tmp, "md5", 3)) {
332 net->sctp.sctp_hmac_alg = "md5";
336 #ifdef CONFIG_CRYPTO_SHA1
337 if (!strncmp(tmp, "sha1", 4)) {
338 net->sctp.sctp_hmac_alg = "sha1";
342 if (!strncmp(tmp, "none", 4)) {
343 net->sctp.sctp_hmac_alg = NULL;
354 static int proc_sctp_do_auth(struct ctl_table *ctl, int write,
355 void __user *buffer, size_t *lenp,
358 struct net *net = current->nsproxy->net_ns;
359 struct ctl_table tbl;
362 memset(&tbl, 0, sizeof(struct ctl_table));
363 tbl.maxlen = sizeof(unsigned int);
366 tbl.data = &new_value;
368 tbl.data = &net->sctp.auth_enable;
370 ret = proc_dointvec(&tbl, write, buffer, lenp, ppos);
373 struct sock *sk = net->sctp.ctl_sock;
375 net->sctp.auth_enable = new_value;
376 /* Update the value in the control socket */
378 sctp_sk(sk)->ep->auth_enable = new_value;
385 int sctp_sysctl_net_register(struct net *net)
387 struct ctl_table *table;
390 table = kmemdup(sctp_net_table, sizeof(sctp_net_table), GFP_KERNEL);
394 for (i = 0; table[i].data; i++)
395 table[i].data += (char *)(&net->sctp) - (char *)&init_net.sctp;
397 net->sctp.sysctl_header = register_net_sysctl(net, "net/sctp", table);
401 void sctp_sysctl_net_unregister(struct net *net)
403 struct ctl_table *table;
405 table = net->sctp.sysctl_header->ctl_table_arg;
406 unregister_net_sysctl_table(net->sctp.sysctl_header);
410 static struct ctl_table_header * sctp_sysctl_header;
412 /* Sysctl registration. */
413 void sctp_sysctl_register(void)
415 sctp_sysctl_header = register_net_sysctl(&init_net, "net/sctp", sctp_table);
418 /* Sysctl deregistration. */
419 void sctp_sysctl_unregister(void)
421 unregister_net_sysctl_table(sctp_sysctl_header);